96 CYCLOSTOMATID^E. 



leaves in all parts of the British Isles south of the 

 Moray Firth. 



Family V. CYCLOSTOMATID^. 

 Genus I. CYCLOSTOMA. 



C. ELEGANS (elegant). 



Globosely oval, solid,* ppaque, light pink, marked with 

 streaks or spots of a darker colour ; very strongly striated 

 in the line of growth, and more closely striated spirally ; 

 whorls four and a half, cylindrical ; suture very deep ; spire 

 blunt ; mouth nearly circular ; umbilicus small, but deep ; 

 oyerculum thick, testaceous. 



This interesting shell is the only British representa- 

 tive of an interesting genus which abounds in species 

 in warmer latitudes. 



It is common in England, Wales, and Ireland, 

 mostly though not exclusively in calcareous soils 

 near the sea. Along the banks of the Thames be- 

 tween Marlow and Maidenhead it occurs in great 

 abundance on the chalk hills. It is also tolerably 

 plentiful in Jersey, where there are no calcareous 

 strata. 



